Though the cause isn’t clear, the chloroplasts may be reacting to carbon dioxide or light levels.
Tag - ultrastructure
Erin Zimmerman
Serial Block Face-SEM visualisation of nuclear tubular extensions in a carnivorous plant
Unusual nuclei, with spindle-like tubular projections, in the placental tissue of Utricularia nelumbifolia may be involved in nucleus-to-cell-to-cell communication.
botanyone
The intricate intracellular structure of a rice mesophyll cell
Rice (Oryza sativa) leaf blades possess lobed mesophyll cells with intricate cell boundaries. Their sub-cellular structure has been observed with transmission electron microscopy (TEM) of thin sections, but the whole...
Guard cells first, then epidermis
Stomata in the moss Funaria are regularly spaced at the base of the capsule. Merced and Renzaglia describe the patterning and distribution of stomata and how they are coordinated with the formation of substomatal...
Floral elaiophores of Vitekorchis, Cyrtochilum and Oncidium
Davies et al. compare the floral elaiophores (oil glands) of four species formerly assigned to Oncidium (Oncidiinae).
Novel structure of placenta in a lycophyte
An examination of an embryo in an underground gametophyte reveals a massive foot with ultrastructural variability comparable to that across major clades.
Floral elaiophore structure in the Gomesa and Oncidium clades
Recent molecular approaches have resulted in the re-circumscription of Gomesa and Oncidium (Orchidaceae; Oncidiinae), together with their respective clades. Stpiczyńska et al. compare the anatomical organization of the...
![Image: Brillouet et al., 2013. [http://dx.doi.org/10.1093/aob/mct168]](https://i0.wp.com/botany.one/wp-content/uploads/2013/11/01-Oct-SIZED-align-left.jpg?resize=585%2C300&ssl=1)
Tann-fastic, a new plant organelle(!!)
Jean-Marc Brillouet et al. have identified a new organelle in plant cells: the 'tannosome' is involved in the formation of condensed tannins.
Nigel Chaffey
Extreme phenotypic variation and fitness in lichens
Phenotypic variability is a successful strategy in lichens for colonizing different habitats. Pérez-Ortega et al. study the extreme phenotypic modifications shown by vagrant populations of the cosmopolitan shrubby...
Photosynthetic costs of foliar variegation in Begonia
Foliar variegation is often assumed to be due to lack of chlorophyll or the presence of special pigments in sections of a leaf, but it can also result from leaf structural variation. Sheue et al. show that naturally...
Pollen-tube growth in early angiosperms
The three earliest extant lineages of flowering plants are represented by only some 16 genera. Despite low species’ diversity, these genera are highly diverse in their morphology, so inferring ancestral features in...
